Novel corrosion inhibition scale inhibitor

Abstract

The invention discloses a novel corrosion inhibition scale inhibitor, which comprises the following constitutions by weight: 1 to 16 polyepoxy sodium succinate, 1 to 18 polyaspartic sodium, 1 to 13 hydrolytic maleic anhydride, 1 to 25 gluconic acid sodium salt, 1 to 18 acrylic acid - acrylate - sulfonate copolymer, 1 to 8 zinc sulfate, 1 to 12 benzotriazol, and 0.5 to 2 NaOH. The novel corrosion inhibition scale inhibitor has the advantages that: the technology for removing SO2 by Ca(OH)2 can be normally run in a middle-sized and small-sized boiler houses, the repairing rate of the equipment is low, and the desulphurization cost can be reduced by 50 percent; the equipment of the copper or the cooper alloy structure can be protected; and a good corrosion inhibition scale inhibition effect can be realized in the environment that the temperature is less than 150 DEG C, and the PH is less than 12.

Description

technical field [0001] The present invention relates to scale inhibitors in water circulation systems, in particular to a new corrosion and scale inhibitor Background technique [0002] In the prior art, most of the desulfurization treatment processes for circulating water in domestic small and medium-sized boiler rooms use the NaOH absorption method, that is, NaOH and SO 2 produce Na 2 SO 3 directly after discharge. Although the above treatment process is convenient to operate, it consumes a large amount of expensive caustic soda, and its desulfurization unit cost is about Ca(OH) 2 SO removal 2 more than double. Nevertheless, domestic small and medium-sized boiler rooms seldom use Ca(OH) 2 SO removal 2 The reason is that with Ca(OH) 2 SO removal 2 Add a large amount of Ca(OH) to the desulfurization circulating water 2 Make Ca 2+ In the circulating water for desulfurization, it is often in a saturated and supersaturated state, and CaSO 3 with CaSO 4 Crystallizat...

AI Technical Summary

Problems solved by technology

CaSO 3 with CaSO 4 The fouling will block the nozzles and pipes, making the equipment unable to operate

At the same time, the desulfurization process will be carried out in an environment with a pH>10, and a high pH value will cause corrosion and damage equipment defects to steel and copper alloys